The aim of the study was to establish reference values for the haemoglobin concentration, haematocrit level,
and the numbers of erythrocytes, thrombocytes, leucocytes, lymphocytes, neutrophils, basophils, eosinophils
and monocytes in the peripheral blood of mixed-breed rabbits and of mixed-breeds with the addition of meat
breed blood, taking into account the impact of the season (spring, summer, autumn, winter) and the sex of the
animals. The study was performed on 200 mixed-breed rabbits and 200 mixed-breed rabbits with the addition
of meat breeds. The results show that the parameters differed between the two groups. The haematocrit value
and the numbers of leucocytes, lymphocytes, basophils, eosinophils and monocytes were lower in mixed-breed
rabbits than they were in mixed-breed rabbits with the addition of meat breed blood, whereas the numbers of
thrombocytes and neutrophils were higher in mixed-breed rabbits than they were in the other group. These
values were similar to those obtained previously for unspecified rabbits and to reference values for New
Zealand rabbits. The season of the year had a different impact on the values examined in the two groups: small
in the mixed-breed group and more significant in the other. In both groups, the effect of the season was more
noticeable in spring and summer. It was also shown that the sex had a moderate impact on the haematological
parameters examined in both groups of rabbits.

Key words: rabbits, values of haematological parameters, season of the year, sex